[ZEPPELIN-5880] Credentials roles

[Reamer]

What is this PR for?

This PR implements the sharing of credentials between users and groups.

Due to additional information in the credential file, the structure has been changed. There is an automatic migration path from the previous to the new format.

What type of PR is it?

• Feature

Todos

What is the Jira issue?

• https://issues.apache.org/jira/browse/ZEPPELIN-5880

How should this be tested?

• CI
• manually in the UI

Screenshots

New Mask to add Credentials (old GUI)

New Mask to add Credentials (new GUI)

New View to see Credentials (old GUI)

New View to see Credentials (new GUI)

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? Yes
• Does this needs documentation? Yes

[Reamer]

Added some Screenshots